package com.linktrip.devicemanager.util;

import java.nio.ByteBuffer;
import java.util.zip.CRC32;

/**
 * @author : CaineZhu E-mail:CaineZhu@me.com
 * @version : V1.0
 * @创建时间 ： 2017年4月30日 下午6:05:36
 * @类说明 : CRC校验
 */
public class CRC8Util {

	static final long crc32tab[] = { 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, 0x706af48fL,
			0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L, 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL,
			0xe7b82d07L, 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL, 0x1adad47dL, 0x6ddde4ebL,
			0xf4d4b551L, 0x83d385c7L, 0x136c9856L, 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
			0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L,
			0xd20d85fdL, 0xa50ab56bL, 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L, 0x45df5c75L,
			0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL, 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L,
			0xcfba9599L, 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L, 0x2f6f7c87L, 0x58684c11L,
			0xc1611dabL, 0xb6662d3dL, 0x76dc4190L, 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
			0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL,
			0x91646c97L, 0xe6635c01L, 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL, 0x1b01a57bL,
			0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L, 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L,
			0x8cd37cf3L, 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L, 0x4adfa541L, 0x3dd895d7L,
			0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL, 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
			0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L, 0xc90c2086L, 0x5768b525L, 0x206f85b3L,
			0xb966d409L, 0xce61e49fL, 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L, 0x2eb40d81L,
			0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L, 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL,
			0x04db2615L, 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, 0xe40ecf0bL, 0x9309ff9dL,
			0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L, 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
			0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L,
			0x17b7be43L, 0x60b08ed5L, 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L, 0xa6bc5767L,
			0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL, 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L,
			0x316e8eefL, 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L, 0xcc0c7795L, 0xbb0b4703L,
			0x220216b9L, 0x5505262fL, 0xc5ba3bbeL, 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
			0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL,
			0x72076785L, 0x05005713L, 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL, 0xe5d5be0dL,
			0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L, 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL,
			0x6fb077e1L, 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL, 0x8f659effL, 0xf862ae69L,
			0x616bffd3L, 0x166ccf45L, 0xa00ae278L, 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
			0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L,
			0x47b2cf7fL, 0x30b5ffe9L, 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L, 0xcdd70693L,
			0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L, 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L,
			0x5a05df1bL, 0x2d02ef8dL };

	static final int crc8tab[] = { 0, 213, 127, 170, 254, 43, 129, 84, 41, 252, 86, 131, 215, 2, 168, 125, 82, 135, 45,
			248, 172, 121, 211, 6, 123, 174, 4, 209, 133, 80, 250, 47, 164, 113, 219, 14, 90, 143, 37, 240, 141, 88,
			242, 39, 115, 166, 12, 217, 246, 35, 137, 92, 8, 221, 119, 162, 223, 10, 160, 117, 33, 244, 94, 139, 157,
			72, 226, 55, 99, 182, 28, 201, 180, 97, 203, 30, 74, 159, 53, 224, 207, 26, 176, 101, 49, 228, 78, 155, 230,
			51, 153, 76, 24, 205, 103, 178, 57, 236, 70, 147, 199, 18, 184, 109, 16, 197, 111, 186, 238, 59, 145, 68,
			107, 190, 20, 193, 149, 64, 234, 63, 66, 151, 61, 232, 188, 105, 195, 22, 239, 58, 144, 69, 17, 196, 110,
			187, 198, 19, 185, 108, 56, 237, 71, 146, 189, 104, 194, 23, 67, 150, 60, 233, 148, 65, 235, 62, 106, 191,
			21, 192, 75, 158, 52, 225, 181, 96, 202, 31, 98, 183, 29, 200, 156, 73, 227, 54, 25, 204, 102, 179, 231, 50,
			152, 77, 48, 229, 79, 154, 206, 27, 177, 100, 114, 167, 13, 216, 140, 89, 243, 38, 91, 142, 36, 241, 165,
			112, 218, 15, 32, 245, 95, 138, 222, 11, 161, 116, 9, 220, 118, 163, 247, 34, 136, 93, 214, 3, 169, 124, 40,
			253, 87, 130, 255, 42, 128, 85, 1, 212, 126, 171, 132, 81, 251, 46, 122, 175, 5, 208, 173, 120, 210, 7, 83,
			134, 44, 249 };

	// crc32位 高位在前地位在后
	public static byte[] crc32(final byte[] buf) {
		CRC32 c = new CRC32();
		c.update(buf);
		int tmp = (int) c.getValue();
		ByteBuffer buffer = ByteBuffer.wrap(ByteUtil.int2bytes(tmp));
		//buffer.order(ByteOrder.LITTLE_ENDIAN);
		byte[] by = ByteUtil.int2bytes(buffer.getInt());
		return by;
	}

	public static byte crc8(byte[] data, int len) {
		return crc8(data, 0, len, (byte) 0);
	}

	public static byte crc8(byte[] data, int offset, int len, byte preval) {
		byte ret = preval;
		for (int i = offset; i < (offset + len); ++i) {
			ret = (byte) crc8tab[(0x00ff & (ret ^ data[i]))];
		}
		return ret;
	}

	public static boolean isVerify(byte[] data, byte crc) {
		if (crc8(data, data.length) == crc)
			return true;
		return false;
	}

	public static void main(String[] args) {
		
		
		  byte[] buf = { 0x30, 0x13, 0x00, 0x20, 0x09, 0x4d, 0x00, 0x00, (byte)
		  0x9d, 0x4d, 0x00, 0x00, (byte) 0xa1, 0x4d, 0x00, 0x00, (byte) 0xa5,
		  0x4d, 0x00, 0x00, (byte) 0xa9, 0x4d, 0x00, 0x00, (byte) 0xad, 0x4d,
		  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
		  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, (byte) 0xb1, 0x4d, 0x00,
		  0x00, (byte) 0xb5, 0x4d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, (byte)
		  0xb9, 0x4d, 0x00, 0x00, (byte) 0xd7, 0x3f, 0x00, 0x00, 0x6d, 0x48,
		  0x00, 0x00, (byte) 0xbd, 0x4d, 0x00, 0x00, 0x19, 0x4a, 0x00, 0x00,
		  (byte) 0x9d, 0x2d, 0x00, 0x00, (byte) 0xc1, 0x4d, 0x00, 0x00, (byte)
		  0xc5, 0x4d, 0x00, 0x00, (byte) 0xc9, 0x4d, 0x00, 0x00, (byte) 0xcd,
		  0x4d, 0x00, 0x00, (byte) 0xd1, 0x4d, 0x00, 0x00, 0x31, 0x4b, 0x00,
		  0x00, (byte) 0xd5, 0x4d, 0x00, 0x00, (byte) 0xd9, 0x4d, 0x00, 0x00,
		  (byte) 0xf5, 0x2d, 0x00, 0x00, (byte) 0xdd, 0x4d, 0x00, 0x00, (byte)
		  0xe1, 0x4d, 0x00, 0x00, (byte) 0xe5, 0x4d, 0x00, 0x00, (byte) 0xe9,
		  0x4d, 0x00, 0x00, (byte) 0xed, 0x4d, 0x00, 0x00, (byte) 0xf1, 0x4d,
		  0x00, 0x00, (byte) 0xf5, 0x4d, 0x00, 0x00, (byte) 0xf9, 0x4d, 0x00,
		  0x00, (byte) 0xfd, 0x4d, 0x00, 0x00, 0x01, 0x4e, 0x00, 0x00, 0x05,
		  0x4e, 0x00, 0x00, 0x09, 0x4e, 0x00, 0x00, 0x0d, 0x4e, 0x00, 0x00,
		  0x11, 0x4e, 0x00, 0x00, 0x15, 0x4e, 0x00, 0x00, 0x19, 0x4e, 0x00,
		  0x00, 0x1d, 0x4e, 0x00, 0x00, 0x2d, (byte) 0xe9, (byte) 0xf0, 0x4f,
		  (byte) 0xa1, (byte) 0xb0, (byte) 0x82, 0x46, 0x02, (byte) 0xae, 0x00,
		  0x20, 0x17, 0x46, 0x1d, 0x46, 0x02, (byte) 0x91, 0x70, 0x62, 0x0d,
		  (byte) 0xf1, 0x44, 0x08, 0x0a, (byte) 0xe0, 0x17, (byte) 0xf8, 0x01,
		  0x1b, 0x02, (byte) 0x98, (byte) 0xd0, 0x47, 0x02, (byte) 0x90, 0x00,
		  0x28, 0x00, (byte) 0xf0, (byte) 0xda, (byte) 0x82, 0x70, 0x6a, 0x40,
		  0x1c, 0x70, 0x62, 0x38, 0x78, 0x08, (byte) 0xb9, 0x70, 0x6a, (byte)
		  0xd4, (byte) 0xe2, 0x25, 0x28, (byte) 0xee, (byte) 0xd1, 0x00, 0x20,
		  (byte) 0xf0, 0x60, 0x30, 0x61, 0x70, 0x61, (byte) 0xb0, 0x61, (byte)
		  0xf0, 0x61 };
		 
		// crc32 0x59ef2826
//		byte[] buf = { 0x50, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 0x24, 0x5f, (byte) 0xa7, 0x04, 0x58, (byte) 0xb6,
//				(byte) 0xd9, (byte) 0x8b, 0x09, 0x01, 0x03, 0x0d, 0x22, 0x00, 0x00, 0x00, (byte) 0xd2, (byte) 0x8e,
//				0x1b, 0x7e, 0x37, 0x19, 0x3f, 0x40, (byte) 0xd9, (byte) 0xec, 0x48, (byte) 0xf5, (byte) 0x9d, 0x60,
//				0x5e, 0x40, (byte) 0xe1, 0x07, 0x05, 0x02, 0x0f, 0x0b, 0x18, 0x00, 0x04, 0x21, 0x1a, 0x00, 0x25, 0x00,
//				0x02, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1d, 0x2d, 0x01, 0x5f, (byte) 0xc8,
//				(byte) 0x88, 0x4b, 0x55, (byte) 0xb0, 0x56, (byte) 0xf3, (byte) 0xf9, (byte) 0xd6, 0x05, (byte) 0xc2,
//				0x3d, 0x03 };
		byte[] bb = crc32(buf);
		ByteUtil.printBytes(bb);

	}

	public static void printByte(byte[] bs1, byte[] bs2) {
		for (byte b : bs1)
			System.out.print(Integer.toHexString(b & 0xff) + " ");
		System.out.println("");
		for (byte b2 : bs2)
			System.out.print(Integer.toHexString(b2 & 0xff) + " ");
		System.out.println("");
	}

}
